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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 157 |
| 3 | 1697 |
| 4 | 190573 |
| 5 | 167719729 |
| 6 | 22092660553 |
| 7 | 57613776809 |
| 8 | 4386989244577 |
| 9 | 91982826261331 |
| 10 | 13432259712845291 |
[2,157,1697,190573,167719729,22092660553, 57613776809,4386989244577,91982826261331, 13432259712845291] |